Fuel-pump for hydrocarbon-engines.



H. F. SHEPHERD. FUEL PUMP FOR HYDROCARBON ENGINES.

APPLICATION FILED AUG. 12, I914- Patented Nov. 9, 1915.

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2-: arms PATENT oration.

HAROLD F. SHEPHERD, OE GROVE CITY, KENNSYLVANIA,

ASSIGNQR T0 BESESEMER GAS ENGINE COMPANY, OF GRGVE CITY, PENNSYLVANIA, A CORPGRAT'LQN GE ?EN1\T- SYLVANIA.

FUEL-PUMP FOB HYDRQGARBON-ENGINES.

Application filed August 12, 1914.

H) all whom, it may concern Be it known that I, HAROLD F. SHEPHERD, a citizen of the United States, residing at Grove City, in the county of Mercer and State of Pennsylvania, have invented new and useful Improvements in Fuel-Pumps for Hydrocarbon-Engines, of which the following is a specification.

This invention relates to fuel pumps for hydrocarbon engines and consists in certain improvements in the construction thereof as will be hereinafter fully described and pointed outin the claims.

It is desirable to be able to operate fuel pumps of hydrocarbon engines manually so as to be able to start the engine.

The object of the present invention is to accomplish this result. I

The invention is illustrated in the accompanying drawings as follows:-

Figure 1 shows a side elevation of a pump, partly in section to better show construction. Fig. 2 a section on the line 22 in Fig. 1.

1 marks the pump barrel, 2 the pump rod, 3 a cross head connected with the rod 2, 4c a guide in which the cross head operates anc st a frame on which the guide is mounted. The pump barrel is also secured to this frame so that the cross head operating in the guides 4 is maintained in alinement with the pump barrel.

A reciprocating actuating rod, ordinarily an eccentric rod, 5 is secured to the cross head by a pin 6, the rod extending into an opening 7 in the cross head. The cross head is telescopically mounted 011 the rod 2 and abuts a shoulder 8 arranged on the rod 2, thus forming a fixed stop for the cross head so that the direct thrust of the reciprocating rod 5 is positively conveyed to the rod 2.

The rod 2 is provided with a head 9 slightly larger than the rod 2 but of a diameter to permit the insertion of the head through the opening 7 the head being arranged in the pocket 10 Within the cross head.

A coil spring 11 is arranged around the rod 2 between the head 9 and the bottom of the pocket 10 and is normally compressed so as to exert pressure on the rod 2 holding thestop or shoulder 8 in contact with the end of the cross head.

It will be understood that the discharge Specification of Letters Patent.

Patented Nov. 9, 1915..

Serial No. 858.390.

movement of the rod 2 is due to the thrust of the rod 5, the cross head communicating the movement directly and positively to the rod by reason of the stop 8. The return movement of the rod has simply the friction of the parts and a very slight lift of the liquid to overcome. The spring 11 is of suliicient strength to normally hold the stop 8 in contact with the end of the cross head. This spring forms a yielding element which "with the telescopic arrangement permits relative movement of the rods in one direction but has sutlicient resistance to such relative movement to prevent such movement in the normal operation of the pump.

A rack 12 is arranged along one side of the rod 2 within the cross head 3 and the gear segment 13 operates in this rack. The gear segment is carried by a handle 1% and projects into a perforation 15 arranged in a projection 18 on the side of the cross head. The gear segment has a small projection 16 concentric with the gear segment which extends into a perforation 17 in the side of the projection 18. There is also a cylindrical surface 19 to the rear of the gear segment which forms a joint i ith the DlTEO ration The gear segment 13 can be inserted in the perforation 15 and when in place the rod 2 may be actuated by rocking the handle 1 the cross head remaining stationary and resistin the pressure exerted on the rod 2 by the gez segment. The leverag'e afforded by the handle and gear segment is such that the spring 11 does not interfere with the ready operation of the rod 2 through the action of said handle.

- By this construction the pump may be initially operated so as to start the engine without disconnecting the pump in any way from its normal driving mechanism. As soon as the engine starts, the gear segment may be withdrawn and the engine continues to operate without any further attention so tar as the driving mechanism is concerned.

hat I claim as new is 1. In a fuel pump for hydrocarbon engines, the combination of a pump rod; a reciprocating driving rod; a connection between the pump rod and the driving rod having a yielding element permitting a relative movement of the rods in one direction, said element having a resistance preventing such relative movement in the normal opera tion of the pump; and a manually operative device for actuating the pump rod relatively to the driving rod, the element yielding to permit the movement of the pump rod as said device is operated.

2. In a fuel pump for hydrocarbon engines, the combination of a pump rod; a reciprocating driving rod; a connection be tween the pump rod and the driving rod having a yielding element permitting a relative movement of the rods in one direction, said element having a resistance preventing such relative movement in the normal operation of the pump; and a manually 0perative device exerting opposing pressures on the pump rod and driving rod for actuating the pump rod relatively to the driving rod, the element yieldingto permit the movement of the pump rod as said device is operated.

3. In a fuel pump for hydrocarbon engines, the combination of a pump rod; a reciprocating driving rod; a head telescopically mounted on one, of said rods and connected with the other of said rods; a fixed stop limiting the telescopic movement in one direction; a yielding element between the head and the rod on which it is mounted normally holding the head against said stop; and manually operative devices for actuatingthe rod on which the head is mounted relatively to the rod to actuate the pump rod, the element yielding to permit the telescopic movement of the head to effect the movement of the pump rod.

- skin a fuel pump for hydrocarbon engines, the combination of a pump rod; a re ciprocating driving rod; a head telescopically mounted on one of said rods and connected withthe other of said rods; a fixed stop limiting the telescopic movement in one direction; a yielding element between the head and the rod on which it is mounted normally holding the head against said stop; and manually operativedevices exert ing opposing pressures on the pump rod and driving rod for actuating the rod on which the head is mounted relatively to the rod to actuate the pump rod, the element yielding to permit the telescopic movement of the head to effect the movement of the pump rod.

5. In a fuel pump for hydrocarbon engines, the combination of a pump rod; a reciprocating driving rod: a cross head scopic connection with said pump rod; a fixed stop for limiting the telescopic movement of the head on the pump rod in one direction; a yielding elementnormally holding said cross head against'said stop; and a manually operative device for actuating the pump rod relatively to the driving rod, the element yielding to permit the movement of the pump red as said device is operated.

6. In a fuel pump for hydrocarbon engines, the combination of a pump rod;'a re ciprocating driving rod; a cross head mounted on the pump rod having a telescopic connection with said pump rod; a fixed stop for limiting the telescopic movement of the mounted on the pump rod having a telehead on the pump rod in onedirection; a V

yielding element normally holding said cross head against said stop; and a manually op rative device for actuating the pumprod relatively to the cross head, the element yielding to permit of this movement.

7. In a fuel pump for hydrocarbon engines, the combination of a pump rod; a reciprocating driving rod; a cross head having a pivotal connection with the driving rod and containing an internal pocket, said cross head being telescopically mounted on the pump rod; a head on the pump rod within the. pocket; a spring between the head and the bottom of the pocket; a stop on the pump rod against which the head abuts a rack on the pump rod; and a gear segment mounted in the head and adapted to operate on the rack to actuate the pump rod.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

HARoLD F. SHEPHERD;

Witnesses:

WM. J. SLoAN, E. JJFITHIAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

